So I'm looking at getting a different lens. Now I would love to be able to afford the Nikon 24 to 70mm F2.8 but its too much for my budget. Now I can always look at this Nikkor AF 24-85 mm f2.8-4 as an option or the Sigma 24 to 70mm but the rep at the camera store said they don't even rent it out any more because of the C/A their copies had not matter what. The other thing I have read about this lens is sometimes the barrel sticks. My question is for those who have more experience with the third party lenses. I have the Sigma 105mm and I love it its tack sharp, fast and has proven to be a great addition to my set. Is the Nikon a better route too go? Its comparibly the same cost as the sigma only difference is the aperature doesn't stay constant. Going to keep searching through posts here to see what else I can learn but if anyone has additional info they want to toss my way I appreciate it. Thanks.